Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
  • A61Q5/12—Preparations containing hair conditioners
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/36—Carboxylic acids; Salts or anhydrides thereof
  • A61K8/361—Carboxylic acids having more than seven carbon atoms in an unbroken chain; Salts or anhydrides thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/36—Carboxylic acids; Salts or anhydrides thereof
  • A61K8/365—Hydroxycarboxylic acids; Ketocarboxylic acids
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/36—Carboxylic acids; Salts or anhydrides thereof
  • A61K8/368—Carboxylic acids; Salts or anhydrides thereof with carboxyl groups directly bound to carbon atoms of aromatic rings
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
  • A61K8/37—Esters of carboxylic acids
  • A61K8/375—Esters of carboxylic acids the alcohol moiety containing more than one hydroxy group
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
  • A61K8/42—Amides
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K8/00—Cosmetics or similar toiletry preparations
  • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
  • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
  • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
  • A61K8/44—Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
  • A61Q5/00—Preparations for care of the hair
  • A61Q5/002—Preparations for repairing the hair, e.g. hair cure
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/20—Chemical, physico-chemical or functional or structural properties of the composition as a whole
  • A61K2800/30—Characterized by the absence of a particular group of ingredients
  • A61K2800/31—Anhydrous
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
  • A61K2800/20—Chemical, physico-chemical or functional or structural properties of the composition as a whole
  • A61K2800/30—Characterized by the absence of a particular group of ingredients
  • A61K2800/34—Free of silicones

Definitions

• the present invention relates to a process for treating keratin fibres using a composition comprising at least two different particular fatty acids, the composition having a low silicone content.
• the hair is damaged and weakened by external atmospheric agents such as pollution and bad weather, and also by mechanical or chemical treatments, such as brushing, combing, dyeing, bleaching, permanent-waving, relaxing and repeated washing.
• the hair thus becomes damaged and may in the long run become dry, coarse, brittle, dull, split and/or soft or else sensitive to humidity, making the hair unmanageable, often with frizziness, and/or difficult to style in a humid environment, in particular in a very humid environment.
• these hair treatments which are often based on silicone-based starting materials, may give the hair a greasy, heavy feel that is not always pleasant for the user.
• these hair treatments have little or no effect on controlling the volume of keratin fibres and/or maintaining the hairstyle and/or hair discipline in a humid or very humid environment.
• a subject of the present invention is a process for treating keratin fibres, comprising step i) of applying to the keratin fibres a composition (C) comprising at least two different compounds D chosen independently from the compounds of formula (I) below, the salts thereof, the isomers thereof, and the solvates thereof, such as hydrates, and mixtures thereof:
• ⁇ R 1 represents:
• - a linear or branched, saturated or unsaturated hydrocarbon-based group comprising from 6 to 26 carbon atoms, the hydrocarbon-based group being optionally substituted with one or more identical or different groups chosen from: hydroxyl (-OH), amino (-NH 2 ), carboxyl (-COOH), (hetero)cyclic such as phenyl and/or optionally interrupted with one or more heteroatoms or groups chosen from -O-, -CO-, -NR a -, or combinations thereof such as -O-CO-, -(CO)-O-, –NR a -(CO)– or –(CO)-NR a –; or
• a (hetero)cyclic group such as phenyl, optionally substituted with one or more identical or different groups chosen from: hydroxyl (-OH) or R b -(CO)-;
• R a represents a hydrogen atom or a linear or branched, saturated or unsaturated hydrocarbon-based group comprising from 1 to 10 carbon atoms optionally substituted with one or more identical or different groups chosen from (-OH), amino (-NH 2 ) or carboxyl (-COOH);
• R b represents a (C 2 -C 10 )alkyl group
• the salts of the compounds of formula (I) are chosen from monovalent salts of the compounds of formula (I), preferably chosen from alkali metal salts such as sodium or potassium salts, ammonium salts, tetra(hydroxy)(C 1 -C 10 )alkylammonium salts, di(hydroxy)(C 1 -C 10 )alkylammonium salts, tri(hydroxy)(C 1 -C 10 )alkylammonium salts, and mixtures thereof, more preferentially chosen from alkali metal salts such as sodium or potassium salts, tetra(hydroxy)(C 1 -C 10 )alkylammonium salts, and mixtures thereof; and
• composition (C) comprises a total silicone content of less than 5% by weight relative to the total weight of composition (C).
• a subject of the present invention is a composition (C) as defined previously.
• a subject of the present invention is the use of a composition (C) as defined previously for caring for keratin fibres, preferably for giving keratin fibres a soft and/or smooth feel and/or sheen, more preferentially for giving them a soft and/or smooth feel.
• a subject of the present invention is the use of a composition (C) as defined previously for protecting keratin fibres from moisture, preferably for limiting the formation of frizziness and/or the increase in volume of the head of hair in a humid environment.
• keratin fibres means fibres of human or animal origin, such as head hair, bodily hairs, the eyelashes, the eyebrows, wool, angora, cashmere or fur. According to the present invention, the keratin fibres are preferably human keratin fibres, more preferentially the head hair.
• alkyl group means a saturated, linear or branched hydrocarbon-based radical comprising from 1 to 30 carbon atoms, preferentially from 1 to 26 carbon atoms, more preferentially from 1 to 22 carbon atoms, for example methyl, ethyl, n -propyl, isopropyl, butyl, n -pentyl, n -hexyl, n -decyl, n -undecyl, n -dodecyl, n -tetradecyl, n -hexadecyl or eicosyl.
• (C x -C y )alkyl group means an alkyl group comprising from x to y carbon atoms.
• hydroxy(C x -C y )alkyl group means a (C x -C y )alkyl group, at least one of the hydrogen atoms of which is optionally replaced with a hydroxyl (-OH) group.
• a (hydroxy)(C x -C y )alkyl group thus denotes a (C x -C y )alkyl group or a hydroxyl(C x -C y )alkyl group, i.e. a (C x -C y )alkyl group in which at least one of the hydrogen atoms is replaced with a hydroxyl (-OH) group.
• di(hydroxy)(C x -C y )alkylammonium salt means an ammonium salt bearing two (hydroxyl)(C x -C y )alkyl groups, said (hydroxyl)(C x -C y )alkyl groups being identical or different.
• tri(hydroxy)(C x -C y )alkylammonium salt means an ammonium salt bearing three (hydroxyl)(C x -C y )alkyl groups, said (hydroxyl)(C x -C y )alkyl groups being identical or different.
• tetra(hydroxy)(C x -C y )alkylammonium salt means an ammonium salt bearing four (hydroxyl)(C x -C y )alkyl groups, said (hydroxyl)(C x -C y )alkyl groups being identical or different.
• (hetero)cyclic group means a cyclic or heterocyclic group.
• cyclic group means a monocyclic or condensed or non-condensed, saturated or unsaturated, notably aromatic, polycyclic carbocycle comprising from 6 to 22 carbon atoms, it being possible for said cyclic group to be substituted with one or more identical or different groups, notably chosen from: (C 1 -C 6 )alkyl, (C 1 -C 6 )alkoxy, (C 1 -C 6 )(poly)hydroxyalkyl, hydroxyl (-OH) or carboxyl (-COOH).
• heterocyclic group means a monocyclic or condensed or non-condensed, saturated or unsaturated, in particular aromatic, polycyclic group comprising from 5 to 22 members and containing from 1 to 3 heteroatoms chosen from a nitrogen, oxygen or sulfur atom, it being possible for said heterocyclic group to be substituted with one or more identical or different groups, notably chosen from: (C 1 -C 6 )alkyl, (C 1 -C 6 )alkoxy, (C 1 -C 6 )(poly)hydroxyalkyl, hydroxyl (-OH) or carboxyl (-COOH).
• saturated hydrocarbon-based group means a hydrocarbon-based group comprising one or more conjugated or non-conjugated ethylenic double bonds.
• a subject of the present invention is a process for treating keratin fibres as defined previously.
• the process according to the present invention made it possible to maintain or even improve the quality of the fibre, notably the softness, disentangling, smoothness and/or discipline and/or sheen, and to limit the formation of frizziness and/or the increase in volume of the head of hair in a humid environment, thus making it easier to style the hair in a humid environment.
• the salts of the compounds of formula (I) are chosen from salts of alkali metals such as sodium or potassium, ammonium salts and tetra(C 1 -C 10 )alkylammonium salts, di(C 1 -C 10 )alkylammonium salts, tri(C 1 -C 10 )alkylammonium salts, and mixtures thereof, preferably chosen from salts of alkali metals such as sodium or potassium, tetra(C 1 -C 10 )alkylammonium salts, and mixtures thereof.
• R 1 represents a linear or branched, saturated or unsaturated hydrocarbon-based group comprising from 6 to 26 carbon atoms, the hydrocarbon-based group being optionally substituted with one or more identical or different groups chosen from: hydroxyl (-OH), amino (-NH 2 ), carboxyl (-COOH), (hetero)cyclic such as phenyl and/or optionally interrupted with one or more heteroatoms or groups chosen from -O-, -CO-, –NR a –, or combinations thereof such as -O-CO-, -(CO)-O-, –NR a -(CO)– or –(CO)-NR a –, preferably an unsubstituted, saturated or unsaturated, linear or branched hydrocarbon-based group comprising from 6 to 26 carbon atoms, more preferentially an unsubstituted, saturated or unsaturated, linear or branched hydrocarbon-based group comprising from 6 to 20 carbon atoms.
• composition (C) does not comprise any salts of the compounds of formula (I) as defined previously.
• At least one of the different compounds D are in non-salified form.
• At least two of the different compounds D are in non-salified form and the mole ratio of the total amount of one of the different compounds D in non-salified form to the total amount of another of the different compounds D in non-salified form in composition (C) ranges from 0.25 to 4.
• composition (C) comprises more than two different compounds D in non-salified form
• mole ratio between two of these different compounds D it is sufficient for the mole ratio between two of these different compounds D to vary from 0.25 to 4 for this criterion to be met.
• At least one of the different compounds D is in non-salified form and at least one of the different compounds D is in salified form and the mole ratio of the total amount of one of the different compounds D in non-salified form to the total amount of one of the different compounds D in salified form in composition (C) is greater than or equal to 1, and preferably ranges from 1 to 100.
• composition (C) comprises more than two different compounds D in non-salified form and/or more than two different compounds D in salified form
• mole ratio of the total amount of one of the different compounds D in non-salified form to the total amount of one of the different compounds D in salified form is sufficient for the mole ratio of the total amount of one of the different compounds D in non-salified form to the total amount of one of the different compounds D in salified form to be greater than or equal to 1, preferably ranging from 1 to 100, in order for this criterion to be met.
• Composition (C) preferably comprises not more than five different compounds D, more preferentially not more than four different compounds D, even more preferentially not more than three different compounds D, and better still not more than two different compounds D, chosen independently from the compounds of formula (I) as defined previously, the salts thereof, the isomers thereof, and the solvates thereof, such as hydrates, and mixtures thereof.
• the different compounds D are chosen from the following compounds 1 to 39, the salts thereof, the isomers thereof, and the solvates thereof, such as hydrates, and mixtures thereof: Oleic acid Compound 1 Palmitic acid Compound 2 Myristic acid Compound 3 Lauric acid Compound 4 Isostearic acid Compound 5 Cocoyl sarcosine Compound 6 Lauroyl lysine Compound 7 Behenic acid Compound 8 n-Octanoyl-5-salicylic acid Compound 9 Hydroxystearic acid Compound 10 2-Dodecanamidopentanedioic acid Compound 11 2-Heptadecanamidopentanedioic acid Compound 12 Glyceryl stearate citrate Compound 13 Capryloylglycine Compound 14 11-Aminoundecanoic acid Compound 15 Capric acid Compound 16 Caprylic acid Compound 17 10-Hydroxydecanoic acid Compound 18 10-Hydroxyde
• the different compounds D are chosen from compounds 1 to 17, 20, 31, 32 or 36, the salts thereof, the isomers thereof, and the solvates thereof, such as hydrates, and mixtures thereof.
• the different compounds D are chosen from compounds 1, 4, 16 or 17, the salts thereof, the isomers thereof, and the solvates thereof, such as hydrates, and mixtures thereof.
• the different compounds D are chosen from compounds 1 to 39, the isomers thereof and the solvates thereof, such as hydrates, and mixtures thereof, preferably from compounds 1, 4, 16 or 17, the isomers thereof and the solvates thereof, such as hydrates, and mixtures thereof.
• the different compounds D are in salified form, they are preferably chosen from the following compounds 1’ to 11’, the isomers thereof and the solvates thereof, such as hydrates, and mixtures thereof:
• X + representing a monovalent cation, preferably a monovalent cation derived from a salt chosen from salts of alkali metals such as sodium or potassium, ammonium salts, tetra(hydroxy)(C 1 -C 10 )alkylammonium salts, di(hydroxy)(C 1 -C 10 )alkylammonium salts, tri(hydroxy)(C 1 -C 10 )alkylammonium salts, and mixtures thereof, more preferentially a monovalent cation derived from a salt chosen from salts of alkali metals such as sodium or potassium, tetra(hydroxy)(C 1 -C 10 )alkylammonium salts, and mixtures thereof.
• a monovalent cation derived from a salt chosen from salts of alkali metals such as sodium or potassium, tetra(hydroxy)(C 1 -C 10 )alkylammonium salts, and mixtures thereof.
• the different compounds D are more preferentially chosen from compounds 1’ to 11’, the isomers thereof and the solvates thereof, such as hydrates, and mixtures thereof, with X + representing a monovalent cation derived from a salt chosen from salts of alkali metals such as sodium or potassium, ammonium salts, tetra(C 1 -C 10 )alkylammonium salts, di(C 1 -C 10 )alkylammonium salts, tri(C 1 -C 10 )alkylammonium salts, and mixtures thereof, preferably chosen from salts of alkali metals such as sodium or potassium, tetra(C 1 -C 10 )alkylammonium salts, and mixtures thereof.
• X + representing a monovalent cation derived from a salt chosen from salts of alkali metals such as sodium or potassium, ammonium salts, tetra(C 1 -C 10 )alkylammonium salts,
• the different compounds D are in salified form, they are even more preferentially chosen from compounds 1’ to 11’, the isomers thereof and the solvates thereof, such as hydrates, and mixtures thereof, with X + representing an Na + , K + , NH 4 + or tetra(C 1 -C 10 )alkylammonium ion.
• the different compounds D are more preferentially chosen from the following compounds 1’’ to 13’’, the isomers thereof and the solvates thereof, such as hydrates, and mixtures thereof:
• the different compounds D when one or more of the different compounds D are in salified form, they are chosen from compounds 5’’, 6’’, the isomers thereof and the solvates thereof, such as hydrates, and mixtures thereof.
• composition (C) comprises a total content of different compounds D of at least 0.01% by weight, preferably at least 0.05% by weight, more preferentially ranging from 0.1% to 100% by weight such as 100% by weight or 0.5% to 30% by weight, relative to the total weight of composition (C).
• the different compounds D are chosen from the following combinations of compounds:
• composition (C) the combination of caprylic acid and lauric acid, the mole ratio of the total amount of caprylic acid to the total amount of lauric acid in composition (C) preferably being equal to 3/1;
• composition (C) the combination of capric acid and lauric acid, the mole ratio of the total amount of capric acid to the total amount of lauric acid in composition (C) preferably being equal to 2/1;
• the mole ratio of the total amount of lauric acid to the total amount of oleic acid in composition (C) preferably being from 0.25 to 0.7, more preferentially being equal to 1/3;
• the mole ratio of the total amount of caprylic acid to the total amount of capric acid in composition (C) preferably being equal to 1/1;
• the mole ratio of the total amount of capric acid to the total amount of sodium laurate in composition (C) preferably being equal to 4/1.
• the different compounds D are chosen from the following combinations of compounds:
• composition (C) the combination of caprylic acid and lauric acid, the mole ratio of the total amount of caprylic acid to the total amount of lauric acid in composition (C) preferably being equal to 3/1;
• composition (C) the combination of capric acid and lauric acid, the mole ratio of the total amount of capric acid to the total amount of lauric acid in composition (C) preferably being equal to 2/1;
• the mole ratio of the total amount of lauric acid to the total amount of oleic acid in composition (C) preferably being from 0.25 to 0.7, more preferentially being equal to 1/3;
• the mole ratio of the total amount of caprylic acid to the total amount of capric acid in composition (C) preferably being equal to 1/1.
• composition (C) comprises the combination of lauric acid and oleic acid, the mole ratio of the total amount of lauric acid to the total amount of oleic acid in composition (C) preferably ranging from 0.25 to 0.7, more preferentially being equal to 1/3.
• composition (C) comprises one of the combinations of two compounds described previously
• the total content of the combination present in composition (C) is preferably at least 0.01% by weight, more preferentially at least 0.05% by weight, even more preferentially from 0.1% to 100% by weight, such as 100% by weight or 0.5% to 30% by weight, relative to the total weight of composition (C).
• Composition (C) is a cosmetic composition, i.e. a composition which comprises a cosmetically acceptable medium, i.e. a medium that is compatible with human keratin fibres.
• Composition (C) may comprise water, preferably in a total content ranging from 0.1% to 90% by weight, relative to the total weight of the composition.
• composition (C) comprises a total water content of less than 30% by weight, preferably less than 10% by weight, more preferentially less than 5% by weight, even more preferentially less than 1% by weight, most preferentially less than 0.1% by weight, and better still less than 0.01% by weight relative to the total weight of composition (C), and even better still composition (C) is anhydrous.
• such small amounts of water may notably be introduced by ingredients of the composition that may contain residual amounts thereof.
• composition (C) preferably ranges from 2 to 11, more preferentially from 3 to 9.
• the pH may be adjusted using an organic or mineral acid or an organic or mineral base usually used in cosmetics.
• Composition (C) may comprise one or more organic solvents chosen from C 2 -C 4 alcohols, ethers, polyols and polyol ethers, aromatic alcohols, hydrocarbon-based oils and mixtures thereof.
• composition (C) When present in composition (C), this or these organic solvents may be present in composition (C) in a total content ranging from 0.01% to 98% by weight, preferably ranging from 30% to 95% by weight relative to the total weight of composition (C).
• Composition (C) is preferably liquid.
• liquid means, on a macroscopic scale, a product which does not have its own shape and cannot be grasped, unlike a solid. It is a fluid which adapts to the shape of the container in which it is placed at room temperature (25°C). When poured into another container, a liquid retains its volume. A liquid thus has its own volume. At rest, the free surface of a liquid is generally flat and horizontal.
• composition (C) may be in any presentation form conventionally used for haircare application.
• composition (C) may be in the form of a lotion, serum, cream, mousse, gel, spray or lacquer.
• Composition (C) may be used in a rinse-off or leave-on application.
• Composition (C) may be in the form of a mask, a conditioning composition or a pre-shampoo. Composition (C) may also be in the form of a composition to be added to or mixed with a mask or a conditioning composition before application.
• composition (C) may be packaged in a pump bottle or in an aerosol container, so as to apply composition (C) in vapourized (lacquer) or foam form.
• composition (C) preferably comprises at least one propellant.
• composition (C) comprises a total content of colouring agents of less than 0.1% by weight, preferably less than 0.01% by weight, more preferentially less than 0.01% by weight relative to the total weight of the composition; even more preferentially, the composition is free of colouring agents.
• colouring agent means an oxidation dye, a direct dye or a pigment.
• oxidation dye means an oxidation dye precursor chosen from oxidation bases and couplers. Oxidation bases and couplers are colourless or sparingly coloured compounds, which, via a condensation reaction in the presence of an oxidizing agent, give a coloured species.
• direct dye means a natural and/or synthetic dye, including in the form of an extract or extracts, other than oxidation dyes. These are coloured compounds that will spread superficially on the fibre. They may be ionic or nonionic, i.e. anionic, cationic, neutral or nonionic.
• composition (C) comprises a total silicone content of less than 2% by weight, preferably less than 1% by weight, more preferentially less than 0.1% by weight, even more preferentially less than 0.01% by weight, most preferentially less than 0.001% by weight relative to the total weight of composition (C), and better still, composition (C) is silicone-free.
• composition (C) comprises a total content of cationic polymers of less than 5% by weight, preferably of less than 2% by weight, more preferentially of less than 1% by weight, even more preferentially of less than 0.1% by weight, most preferentially of less than 0.01% by weight, and better still of less than 0.001% by weight relative to the total weight of composition (C), and even better still composition (C) is free of cationic polymers.
• cationic polymer means any non-silicone polymer (not comprising silicon atoms) containing cationic groups and/or groups that can be ionized into cationic groups, and not containing any anionic groups and/or groups that can be ionized into anionic groups.
• composition (C) comprises a total content of cationic surfactants of less than 5% by weight, preferably less than 2% by weight, more preferentially less than 1% by weight, even more preferentially less than 0.1% by weight, most preferentially less than 0.01% by weight, and better still less than 0.001% by weight relative to the total weight of composition (C), and even better still composition (C) is free of cationic surfactants.
• composition (C) comprises a total content of poly(oxyethylenated) compounds of less than 5% by weight, preferably of less than 2% by weight, more preferentially of less than 1% by weight, even more preferentially of less than 0.1% by weight, most preferentially of less than 0.01% by weight, and better still of less than 0.001% by weight relative to the total weight of composition (C), and even better still composition (C) is free of poly(oxyethylenated) compounds.
• poly(oxyethylenated) compounds examples include polyethylene glycols (PEGs).
• Composition (C) may be applied to dry or wet keratin fibres, preferably wet keratin fibres.
• the bath ratio of composition (C) applied to the keratin fibres may range from 0.02 to 10.
• bath ratio means the ratio between the total weight of composition (C) applied and the total weight of keratin fibres to be treated.
• the process may comprise at least one additional step following step i) chosen from steps ii) to iv) below:
• composition (C) a step of applying composition (C) to the keratin fibres, preferably for a period of at least 10 seconds, said application step optionally being performed under an airtight film of wrapper or plastic film type;
• a step of drying the keratin fibers in ambient air or using a heating device iv) a step of drying the keratin fibers in ambient air or using a heating device.
• the process comprises the additional steps ii) and iv) as described previously and performed in that order.
• the process comprises all the additional steps ii), iii) and iv) as described previously and performed in that order.
• the step of applying composition (C) may last from 10 seconds to 60 minutes, preferably from 30 seconds to 30 minutes.
• the temperature of the heating device may range from 45°C to 230°C, preferably from 45°C to 100°C, more preferentially from 50°C to 80°C.
• a hairdryer, a heating hood, an iron or a heating brush may be used, for example, as heating device.
• the drying step iv) may also be a combination of drying with air or with a heating device at a temperature ranging from 50°C to 80°C, such as a hairdryer or a heating hood, possibly followed by an ironing step, preferably with a straightening iron.
• Steps i) and optionally steps ii) to iv) may be repeated as many times as required and each cycle of steps may be spaced from the next by a few minutes to a few days or weeks. Different hair treatments of the invention may be performed between different application cycles, before or after.
• a subject of the present invention is a composition (C) as defined previously.
• a subject of the present invention is the use of a composition (C) as defined previously for caring for keratin fibres, preferably for giving keratin fibres a soft and/or smooth feel and/or sheen, more preferentially for giving them a soft and/or smooth feel.
• a subject of the present invention is the use of a composition (C) as defined previously for protecting keratin fibres from moisture, preferably for limiting the formation of frizziness and/or the increase in volume of the head of hair in a humid environment.
• compositions C1 to C4 were prepared according to the preparation protocols described hereinbelow:
• compositions Compound 1 Compound 2 Mole ratio Compound 1/Compound 2 C1 Lauric acid Oleic acid 1/3 C2 Lauric acid Caprylic acid 1/3 C3 Lauric acid Capric acid 1/2 C4 Caprylic acid Capric acid 1/1
• the mixture is heated with stirring at 70°C for 1 hour.
• the temperature is allowed to return to room temperature with stirring.
• the product obtained is a colourless, transparent, slightly viscous, oily liquid.
• the mixture is heated with stirring at 70°C for 1 hour.
• the temperature is allowed to return to room temperature with stirring.
• the product obtained is a colourless, transparent, slightly viscous, oily liquid.
• the mixture is heated with stirring at 70°C for 1 hour.
• the temperature is allowed to return to room temperature with stirring.
• the product obtained is a colourless, transparent, slightly viscous, oily liquid.
• caprylic acid 1 mol is weighed out in a flask into which 1 mol of capric acid is added.
• the mixture is heated with stirring at 70°C for 1 hour.
• the temperature is allowed to return to room temperature with stirring.
• the product obtained is a colourless, transparent, slightly viscous, oily liquid.
• Example 1 Evaluation of the hairstyle hold in a humid environment
• the hairstyle hold i.e. the formation of frizziness and the increase in the volume of the head of hair in a humid environment, were evaluated for compositions C1, C2 and C4 according to the evaluation protocol described hereinbelow.
• the locks were washed with a DOP shampoo (0.4 g/g of hair) before application of the test compositions.
• test compositions 81 mg were then applied to separate wet locks, wrung out beforehand and dabbed on absorbent paper. This application was made with the fingers while massaging the hair fibre.
• the locks of hair were then combed, disentangled and placed in a glove box at 20% relative humidity at 25°C for 2 hours.
• the locks were then placed in an oven at 80% relative humidity at 25°C for 24 hours.
• Volume and frizziness measurements were taken by measuring the width of the lock at mid-height and compared with the value obtained for a reference lock that had not been treated with the composition according to the invention.
• width values of the locks at mid-height are lower for the locks treated via the process according to the invention than for the reference lock.
• the process according to the invention thus makes it possible to limit the formation of frizziness and the increase in hair volume in a humid environment, even in the absence of silicone-based starting materials.
• the surface of natural hair is perceived as smooth, i.e. with a low coefficient of friction, whereas the surface of damaged hair is perceived as rough, i.e. with a high coefficient of friction.
• Hair treatments that damage the hair such as dyeing and bleaching, are known to increase the hair’s coefficient of friction.
• composition C1 The “smooth feel” was evaluated for composition C1 according to the evaluation protocol described hereinbelow.
• the 3.5 cm-long lock is fixed in the specimen holder of a Zwickiline Z2.5 mechanical testing machine (Zwick, Germany) equipped with a 100 Newton (N) measuring cell.
• a normal force of 0.5 N is applied to the lock using forceps covered with disposable plastic foam. The foam is replaced after each measurement.
• the test machine applies a movement at a constant speed of 100 mm/min to extract the lock from the forceps.
• the force required to extract the hair is measured as a function of the displacement.
• the force/displacement curve obtained is characterized by a plateau at the end of the stroke, and the average force at the plateau is recorded.
• the impact of the hair treatments on the friction properties is determined by comparing the average force at the plateau for reference locks with the average force at the plateau for treated locks.
• the hair is conditioned at 25°C and 45% relative humidity.
• the hair locks are immersed in demineralized water for one minute before measurement.
• Composition C1 was applied according to the leave-on protocol described hereinbelow, then dry and wet measurements were taken according to the protocol described previously.
• a force ratio between treated and untreated hair was thus determined: F treated (N)/F untreated (N).
• compositions Application of the compositions to the hair while still wet, in a bath ratio of 0.15 g/g of hair, no leave-on time;
• Example 3 Evaluation of the hairstyle hold in a humid environment
• compositions C5 to C8 were prepared. All the amounts are shown as mass percentages relative to the total weight of the composition.
• the hairstyle hold i.e. the formation of frizziness and the increase in the volume of the head of hair in a humid environment, were evaluated for compositions C5 to C8 according to the evaluation protocol described hereinbelow.
• the locks were washed with a DOP shampoo (0.4 g/g of hair) before application of the test compositions.
• test compositions 81 mg were then applied to separate wet locks, wrung out beforehand and dabbed on absorbent paper. This application was made with the fingers while massaging the hair fibre.
• the locks of hair were then combed, disentangled and placed in a glove box at 20% relative humidity at 25°C for 2 hours.
• the locks were then placed in an oven at 80% relative humidity at 25°C for 24 hours.
• Volume and frizziness measurements were taken by measuring the width of the lock at mid-height and compared with the value obtained for a reference lock that had not been treated with the composition according to the invention.
• compositions tested Width of locks at mid-height (before application of the compositions) Final width of locks at mid-height ( on leaving the oven ) C5 (Comparative) 2 3.8 C6 (Invention) 2 2.9 C7 (Comparative) 2 3.4 C8 (Comparative) 2 3.7 Reference (Untreated lock) 2 5.8
• width values of the locks at mid-height are lower for the lock treated via the process according to the invention than for the comparative and reference locks.
• the process according to the invention thus makes it possible to limit the formation of frizziness and the increase in hair volume in a humid environment, even in the absence of silicone-based starting materials.

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• 2022
  • 2022-12-16 FR FR2213688A patent/FR3143335A1/fr active Pending
• 2023
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